Inspector George Gently 8.30pm, BBC One
A MOMENT of silent tribute, please, as tonight’s feature-length investigation is the last ever episode of the series, with Martin Shaw as the principled, stolid detective serving out the twilight of his career in Northern England, following the murder of his wife in London. Since 2007, these films have followed him and his younger partner, John Bacchus (the splendid Lee Ingleby), as the 1960s turned into the grim early 1970s, and while the series has never quite set the world on fire, it’s never quite got its due, either. Dependably involving, atmospherically filmed, if they dubbed them into Swedish, stuck on English subtitles, then started repeating them on BBC Four, they’d be much more chattered about. As tonight’s final case begins, Gently is back in London, giving evidence against former colleagues in a police corruption trial, where he gets drawn into examining the unsolved murder of a young secretary. Meanwhile, in Newcastle, Bacchus is investigating a killing at a picket line. As political unrest churns around them, the cases begin to move together.